Multiple Conversion Formats
Convert audio files such as M4A, MP3, and WAV; video files such as MP4, WEBM, and MOV; and images such as JPG, PNG, and WEBP into formats suited to your needs.
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Frequently used categories are listed first, with concise card descriptions.
Web Tool CategoriesRanked by actual successful usage in the last 90 days
Popular Tools
466ToolsEasy for BeginnersFile Selection Type
Rotate Video
Rotate the video 90 degrees clockwise.
VideoAspect Ratio & Layout
Easy for BeginnersFile Selection Type
Flip Video Horizontally or Vertically
Flip a video horizontally or vertically.
VideoAspect Ratio & Layout
Easy for BeginnersFile Selection Type
Change Video Speed
Adjust video playback and audio speed together from 0.25x to 4x.
VideoMerge, Split and Adjust Speed
Easy for BeginnersFile Selection Type
Compress Video to Target File Size
Analyze video duration and compress the video using a bitrate calculated to approach the target file size in MB.
VideoTarget File Size
Easy for BeginnersFile Selection Type
Extract Video Frames
Extract the specified number of frames per second and save them as a ZIP of JPG images.
VideoFrames & Thumbnails
Easy for BeginnersFile Selection Type
GIF to Video
Convert animated GIFs into MP4 videos.
VideoFormat & Audio
Easy for BeginnersFile Selection Type
Automatically Generate Video Subtitles
Uses Whisper to recognize speech in videos and generate SRT subtitles. Local translation and bilingual subtitles are also supported for Korean and English speech.
VideoSubtitles
Easy for BeginnersFile Selection Type
Convert SRT/VTT Subtitles
Convert subtitles between SRT and WebVTT formats.
VideoSubtitles
Easy for BeginnersFile Selection Type
Burn Subtitles into Video
Select a video and an SRT or VTT file to burn subtitles into the video.
VideoSubtitles
Easy for BeginnersFile Selection Type
Shorten Silent Sections in Videos
Automatically shorten silent sections at the beginning, middle, and end.
VideoMute & Audio
Easy for BeginnersFile Selection Type
Automatically Convert to Vertical Short-Form Video
Creates a 1080×1920 vertical video using center, face, or full-body detection. Detection accuracy varies depending on the composition.
VideoAspect Ratio & Layout
Easy for BeginnersFile Selection Type
Extract Video Thumbnails
Save a frame from the desired point in the video as a JPG thumbnail.
VideoFrames & Thumbnails
Easy for BeginnersFile Selection Type
Combine Multiple Videos into One Screen
Arrange up to four videos in a 2-way or 4-way split-screen layout.
VideoAspect Ratio & Layout
Easy for BeginnersFile Selection Type
Audio Noise Reduction
Reduce low-frequency noise, high-frequency noise, and static.
AudioNoise & Volume
Easy for BeginnersFile Selection Type
Automatic Volume Normalization
Normalize audio loudness to a target of -16 LUFS for broadcasting and podcasts.
AudioNoise & Volume
Easy for BeginnersFile Selection Type
Easily Separate Vocals and Background Audio
Extract or cancel the center channel of stereo audio. This is not AI-powered instrument separation.
AudioVocals & Background Audio
Easy for BeginnersFile Selection Type
Remove Vocals
Reduce vocals by canceling the center channel of stereo audio.
AudioVocals & Background Audio
Easy for BeginnersFile Selection Type
Merge Audio
Merge multiple audio files into one file in sequence.
AudioMerge & Speed
Easy for BeginnersFile Selection Type
Change Audio Speed
Change playback speed while preserving pitch as much as possible.
AudioMerge & Speed
Easy for BeginnersFile Selection Type
Change Audio Pitch
Change the pitch from -12 to +12 semitones while compensating for playback duration.
AudioPitch
Easy for BeginnersFile Selection Type
Convert Audio Files to Text Subtitles
Transcribe speech with Whisper and generate SRT subtitles.
AudioSpeech Recognition
Easy for BeginnersFile Selection Type
Automatically Remove Audio Silence
Automatically shorten silence at the beginning, middle, and end of long recordings.
AudioNoise & Volume
Easy for BeginnersFile Selection Type
Podcast Highlight Segments
Detect long speech segments using silence boundaries and generate timestamps.
AudioSpeech Recognition
Easy for BeginnersDirect Input
Convert Script to SRT Subtitles
Convert a line-separated script into SRT subtitles with evenly spaced timing.
Writing & LifestyleCreate Subtitles
Easy for BeginnersFile Selection Type
Merge Multiple Excel Files
Copy all sheets from multiple XLSX files into one workbook.
Excel & DataMerge
Easy for BeginnersFile Selection Type
Split Excel Sheets into Separate Files
Split each sheet in an Excel workbook into a separate XLSX file and package them in a ZIP.
Excel & DataSplit
Easy for BeginnersFile Selection Type
Merge Multiple CSV Files
Combine the headers and rows of multiple CSV files into a single UTF-8 CSV file.
Excel & DataMerge
Easy for BeginnersFile Selection Type
Remove Duplicate Table Rows
Remove exact duplicate rows from CSV or XLSX files, keeping one copy of each.
Excel & DataOrganize
Easy for BeginnersFile Selection Type
Remove Empty Rows & Columns
Find and delete empty rows and columns.
Excel & DataOrganize
Easy for BeginnersFile Selection Type
Standardize Phone Number, Date, and Amount Formats
Automatically standardize phone numbers, dates, amounts, and whitespace in a table.
Excel & DataOrganize
Easy for BeginnersFile Selection Type
Compare Two Excel Files
Exports differing cells, their rows and columns, and their previous and new values to XLSX.
Excel & DataCompare
Easy for BeginnersFile Selection Type
Split Columns
Split the selected column into multiple columns using a delimiter.
Excel & DataColumn Operations
Easy for BeginnersFile Selection Type
Merge Columns
Combine multiple columns using a specified delimiter to create a new column.
Excel & DataColumn Operations
Easy for BeginnersFile Selection Type
Character Encoding Converter
Resaves CSV and TXT files using UTF-8, CP949, or EUC-KR encoding.
Excel & DataEncoding
Easy for BeginnersFile Selection Type
Password-Protect XLSX
Protect an Excel file in an AES-encrypted ZIP archive.
Excel & DataPassword Protection
Easy for BeginnersFile Selection Type
Convert JSON to CSV
Convert a JSON array of objects into a CSV table.
Excel & DataJSON·CSV·XLSX
Everything from file conversion to calculations and diagnostics in one place
REGOLITH is more than a collection of links. It provides functional web tools that take you from entering data and running tasks to reviewing and saving results. Original files remain unchanged, with results created separately. Each tool page explains supported formats, usage steps, and how to review results before you begin.
Getting Started Guide
Instructions for selecting files, configuring options, running tools, and saving results are available on a separate guide page and within each tool.
Detailed Task Descriptions
Provides format characteristics, recommended uses, guidelines for verifying calculation results, and precautions for handling sensitive files.